Mark Robert Bush, MD
Reproductive Endocrinology Physician · Littleton, CO
Mark Robert Bush, MD is a reproductive endocrinology physician with a practice address in Littleton, Colorado, and NPI 1144299751, issued on Mar 16, 2006. Check the license (Colorado 42370, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Robert Bush
- Credential
- MD
- Primary taxonomy
- Reproductive Endocrinology Physician 207VE0102X
- License number
- 42370 CO
Self-reported in NPPES; status is on the state search - Practice location
- 271 W County Line RD, Littleton, CO 80129
- Phone
- (303) 794-0045
- Enumerated
- Mar 16, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest reproductive endocrinology physician records → All 35 in Colorado → Look up another NPI →
Also registered at 271 W County Line RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Swanson, MDReproductive Endocrinology Physician1861461840
Verify Mark Robert Bush in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 42370Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $240.24
11 payments; by number, the most common kind was food and beverage; the largest payer was Organon Llc. The 1,066 providers of this specialty with any payment received $1,086.52 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mark Robert Bush among 35 reproductive endocrinology physician records in Colorado
Mark Robert Bush, MD is one of 35 reproductive endocrinology physician records with a practice address in Colorado. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 54% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 3% of these records are
- Record last updated2026 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VE0102X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Reproductive Endocrinology Physician providers in Colorado
There are 35 reproductive endocrinology physician records in Colorado.
All 35 in Colorado → Every provider in Littleton → Reproductive Endocrinology Physician nationwide →
The 8 reproductive endocrinology physician records with the nearest ZIP codes
- Abigail BernardLittleton, CO 801291497218788
- Jasmine Chiang, M.D.Highlands Ranch, CO 801291235575218
- Robert Greene, MDLittleton, CO 801291063428340
- Michael Swanson, MDLittleton, CO 801291861461840
- Jessica Bauer, M.D., M.S.Lone Tree, CO 801241851684831
- Lauren Ehrhart, MDLone Tree, CO 801241083856652
- Eric Surrey, M.D.Lone Tree, CO 801241295745925
- Tiffany Von Wald, M.D.Lone Tree, CO 801241093825408
Common questions
What is Mark Robert Bush, MD's NPI number?
Mark Robert Bush, MD's National Provider Identifier (NPI) is 1144299751, issued on Mar 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Robert Bush, MD located?
The NPPES record lists a practice address at 271 W County Line RD, Littleton, CO, 80129. Phone: (303) 794-0045. Providers update this record themselves, so call before visiting.
How can I verify Mark Robert Bush, MD's license?
NPPES lists Colorado license number 42370, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.